Character design- Concept cards

The cards I picked seem to follow the pattern commonly associated with card games, the first game that came to mind was Hearthstone becasue it is an online card game. After some research into online card games, it was clear that popular table top card games seem to make their way onto Pc or portable consoles which i found interesting.

RTS (real time strategy) games seem to also work with these cards. so I have been looking at some popular examples like Starcraft 2 and Planetary Annihilation: Titans to try and get ideas.